DOESNT SAVE PROJECTS

Whenever I am trying to use UE4, the engine doesn’t save my work. I click save all and return and nothing is there.
Help Greatly Appreciated.

Also, UE4 crashes every 30 seconds and I have to wait 5 minutes for it to start working. It seems like it often crashes after building lighting or using splines and placing materials on landscapes on splines.
PC Specs-
i5-6600k
16GB DDR4 Memory
GTX 1070 8GB SC